High molecular particle composite sound absorbing material, its mfg. method and uses

A technology of polymer particles and polymer materials, which is applied in the field of polymer particle composite sound-absorbing materials and their preparation, to achieve high absorption strength, broaden the sound-absorbing frequency band, and improve the mid-low frequency sound absorption coefficient

Inactive Publication Date: 2006-09-20
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This innovative concept and preparation method of sound-abs

Method used

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  • High molecular particle composite sound absorbing material, its mfg. method and uses
  • High molecular particle composite sound absorbing material, its mfg. method and uses
  • High molecular particle composite sound absorbing material, its mfg. method and uses

Examples

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Example Embodiment

[0029] Example 1:

[0030] The average particle size is 1000μm, the thickness of the particle layer is 30mm, the polypropylene particle layer 3; the apparent density is 85kg / m 3 , A polyurethane (PU) foam porous layer 2 with a thickness of 5mm; a polyvinyl chloride (PVC) perforated layer 1 with a perforated hole diameter of 3.5mm, an opening rate of 1.8%, and a thickness of 3mm; placed in the plastic mold box 4 sequentially , The periphery of the mold box and the periphery of the polymer material surface are bonded into a whole with adhesive.

Example Embodiment

[0031] Example 2:

[0032] The average particle size is 150μm, and the thickness of the particle layer is 20mm. Waste rubber powder particle layer 3; the apparent density is 15kg / m 3 , A polyethylene (PE) foam porous layer 2 with a thickness of 10mm; a polyvinyl chloride (PVC) perforated layer 1 with a perforated hole diameter of 5mm, an opening ratio of 1.75%, and a thickness of 1mm; placed in the plastic mold box 4 in a gradient , The periphery of the mold box and the periphery of the polymer material surface are bonded into a whole with adhesive.

Example Embodiment

[0033] Example 3:

[0034] The polysiloxane particle layer 3 with an average particle diameter of 250μm and a particle layer thickness of 10mm; the apparent density is 67.5kg / m 3 , A polyurethane (PU) foam porous layer 2 with a thickness of 15mm; a polypropylene (PP) perforated layer 1 with a perforated pore diameter of 10.5mm, an opening ratio of 10.65%, and a thickness of 12mm; put them in the plastic mold box 4 in a gradient, The periphery of the mold box and the periphery of the surface layer of the polymer material are bonded into a whole with an adhesive.

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Abstract

The invention is a high molecular sound absorbing composite and the preparing method and use thereof, characterized by comprising high molecular grain layer, high molecular porous layer and high molecular pierced layer, arranging the three layers of high molecular materials in a fixed die box in a mode of gradient variation of acoustic impedance and bonding the die box with surface layers of the high molecular material together. In a range of 300-2000Hz, it has average sound absorbing coefficient greater than 0.4, strong sound absorbing ability with the maximum sound absorbing coefficient up to 1.0, and wide sound absorbing frequency range, and its noise reducing coefficient is up to 0.68 and simultaneously it is thinner.

Description

technical field [0001] The invention relates to a polymer particle composite sound-absorbing material, a preparation method and application thereof, and belongs to the field of functional polymer materials. Background technique [0002] With the development of science and technology and modern industry, noise pollution has become a worldwide problem. At the same time, with the enhancement of environmental awareness, people's requirements for the sound environment are getting higher and higher. As an engineering technology, the development of sound absorption and noise reduction depends on the development and application of new sound-absorbing materials. The current sound-absorbing materials mainly include inorganic, metal, organic porous materials and resonant sound-absorbing materials. Inorganic mineral porous materials such as glass wool have good sound absorption performance, but there are problems such as environmental pollution and health hazards; metal foam and fiber...

Claims

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Application Information

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IPC IPC(8): G10K11/168
Inventor 黄光速周洪李波王强郑静
Owner SICHUAN UNIV
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